BIO-EFFICACY OF COLOTROPIS PROCERA AND LANTANA CAMARA AGAINST SPODOPTERA LITURA (TOBACCO CUT-WORM)

Abstract

The use of pesticides such as organophosphates and carbamates for controlling various pests is an effective strategy for protecting crops. But these chemical pesticides pose serious threats to the environment and to non-target organisms due to its persistent nature. Use of natural pesticides based on Phytochemcials as active ingredients obtained from Botanical is a viable option and being popular due to their eco-friendly and non-toxicological properties. Calotropis proceraand Lantana camara is a weed having Different medicinal properties. Present study was designed to study the efficacy of two plants extracts viz., Calotropis proceraand Lantana camara only-aerial parts were taken against the Spodoptera litura (Third instar larvae), each was taken in different concentration in three replications of 24, 48 and 72 hours. After every interval of time the mortality percentage was detected. The percentage mortality was also studied with other solvents ie. hexane, aqueous, chloroform, ethyl acetate, methanol, polar, semipolar and non-polar solvents at different concentrations these collected data were carefully analysed using MS Excel and poloplur software. The LD50 and LD90 estimated using Hexane, Aqueous, Chloroform, Ethyl acetate, methanol extracts of C. procera were 7.02, 12.73, 5.48, 9.54, 8.28 and 21.08, 41.34, 16.10, 24.59, 35.15 respectively with fiducial limit of 5.82 to 9.00, 9.50 to 27.19, 3.53 to 8.54, 7.89 to 13.64, 6.46 to 13.04 and 14.30 to 47.89, 21.63 to 28.29, 9.73 to 128.03, 16.13 to 68.74, 19.06 to 179.25. The LD50 and LD90 limits estimated with Hexane, Aqueous, Chloroform, Ethyl acetate extract L. camara wire 7.89, 4.11, 5.02, 11.79, 9.23 and 54.14, 23.54, 26.74, 94.27, 31.68. Respectively with f iducial limits of 5.69 to 12.50, 1.59 to 8.73, 3.72 to 6.82, 8.01 to 23.91, 7.31 to 12.47 and 26.89 to 243.13, 10.29 to 1270.69, 16.33 to 67.12, 38.69 to 806.11, 20.72 to 69.33 respectively.